This dream may symbolize your desire for motherhood and nurturing. The white walls and gray floors of the office-like building represent a sterile and clinical environment, possibly reflecting your rational and logical approach to the idea of having children. The sound of the baby’s heartbeat may represent your longing for a child and the potential for new life. Your mother’s pregnancy in the dream could symbolize your own potential for motherhood and the idea that it is not too late for you to have children. Your tears of happiness may indicate your deep emotional connection to the idea of motherhood. The fact that you are able to feel the baby’s movements and want to protect it may suggest your strong maternal instincts. The mention of a younger brother could represent your desire to care for and protect those who are younger and more vulnerable. Overall, this dream may reflect your subconscious thoughts and desires surrounding motherhood and family.